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CVE-2014-0160

The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remote attackers to obtain sensitive information from process memory via crafted packets that trigger a buffer over-read, as demonstrated by re…

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The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remote attackers to obtain sensitive information from process memory via crafted packets that trigger a buffer over-read, as demonstrated by reading private keys, related to d1_both.c and t1_lib.c, aka the Heartbleed bug.
CVSS 7.5 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.6/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.5: +1.12
  • Fresh EPSS: 100.00%: +0.50

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 12 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Huntress
Press · 21 Nov 2025, 08:00 · CVE-2014-0160 Vulnerability: Analysis, Impact, Mitigation - Huntress
SC Media UK
Press · 05 May 2025, 07:00 · 11 Ways Heartbleed Changed Cybersecurity - SC Media UK
SentinelOne
Press · 28 Apr 2025, 07:00 · OpenSSL 3 Critical Vulnerability: Steps for Organizations - SentinelOne
Korben
Press · 05 Nov 2024, 08:00 · Flawz - A TUI tool to explore CVE vulnerabilities - Korben
Security Magazine
Press · 27 Nov 2020, 08:00 · Hidden risks with third-party software and how to mitigate those risks - Security Magazine
See all 12 source documents
The Hacker News
Press · 23 Jan 2017, 08:00 · Over 199,500 Websites Are Still Vulnerable to Heartbleed OpenSSL Bug - The Hacker News
Unit 42
Press · 20 Aug 2014, 07:00 · Examining the CHS Breach and Heartbleed Exploitation - Unit 42
CSO
Press · 11 Apr 2014, 07:00 · How to fix the Heartbleed bug - CSO
SecurityWeek
Press · 10 Apr 2014, 07:00 · Why The Heartbleed Vulnerability Matters and What To Do About It - SecurityWeek
Rapid7
Press · 10 Apr 2014, 07:00 · Security Advisory: OpenSSL Heartbleed Vulnerability (CVE-2014-0160) in Metasploit (Updated 4/11/14 2:20pm EDT) - Rapid7
Cisco Blogs
Press · 09 Apr 2014, 07:00 · OpenSSL Heartbleed vulnerability CVE-2014-0160 – Cisco products and mitigations - Cisco Blogs
The Hacker News
Press · 08 Apr 2014, 07:00 · Heartbleed - OpenSSL Zero-day Bug leaves Millions of websites Vulnerable - The Hacker News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.6 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

7

Public exploit entries / repo candidates

See 7 repos with metrics
RepositoryStarsForksLanguageUpdated
sensepost/heartbleed-poc17184Ruby10 Jul 2014, 21:17
mpgn/heartbleed-PoC8543Python20 Feb 2021, 19:41
hreese/heartbleed-dtls50Go26 Mar 2016, 12:21
indrajeetmp11/Heartbleed-PoC-Exploit-Script20Python17 Nov 2025, 06:26
PinkP4nther/Heartbleed_PoC20Rust09 Oct 2021, 06:41
Ayushsinha322/heartbleed-lab00Python16 Sep 2026, 05:06
caiqiqi/OpenSSL-HeartBleed-CVE-2014-0160-PoC04Python08 Nov 2018, 02:51
Public exploit evidence
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.5; EPSS 100.0%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:57:34.453459+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
07 Apr 2014, 00:00
First press mention
08 Apr 2014, 07:00
Added to the CISA KEV catalog
04 May 2022, 00:00
Latest press mention
21 Nov 2025, 08:00
Score calculated
05 Nov 2026, 13:57
PoCs on GitHub
7 repositories